#!/usr/bin/python

# Copyright (c) 2009, Purdue University
# All rights reserved.
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# Redistributions of source code must retain the above copyright notice, this
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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"""Tree sync tool for Roster"""


__copyright__ = 'Copyright (C) 2009, Purdue University'
__license__ = 'BSD'
__version__ = '0.5'


import sys
import os

from optparse import OptionParser
import ConfigParser

def main(args):
  """Collects command line arguments. Exports tree.

  Inputs:
    args: list of arguments from the command line
  """
  parser = OptionParser()

  parser.add_option('-c', '--config-file', action='store', dest='config_file',
                    help='Config File Location', metavar='<config-file>',
                    default=None)
  parser.add_option('-r', '--root-directory', action='store',
                    dest='root_directory',
                    help='Root directory to store configuration files.',
                    default='./bind_config')
  parser.add_option('-d', '--destination-directory',
                    dest='destination_directory',
                    help='Destination directory on dns servers.',
                    metavar='<destination-directory>',
                    default='/etc/named')
  parser.add_option('-u', '--user-name', action='store', dest='user_name',
                    help='Rsync username.', metavar='<user-name>',
                    default=None)
  parser.add_option('-p', '--port', action='store', dest='port',
                    help='Rsync port number.', metavar='<port>',
                    default=None)

  (globals()["options"], args) = parser.parse_args(args)

  dns_server_sets = None
  file_dict = {}
  for server_set in os.listdir(options.root_directory):
    config_parser = ConfigParser.SafeConfigParser()
    config_file_handle = config_parser.read('%s/%s/%s' % (
        options.root_directory, server_set,
        server_set.replace('servers', 'config')))
    for dns_server in config_parser.get(
          'dns_server_set_parameters', 'dns_servers').split(','):
      rsync_dir = '%s/%s/*' % (options.root_directory, server_set)
      rsync_url_parts = []
      if( options.user_name ):
        rsync_url_parts.append('%s@' % options.user_name)
      rsync_url_parts.append(dns_server)
      if( options.port ):
        rsync_url_parts.append(':%s' % options.port)
      rsync_url_string = ''.join(rsync_url_parts)
      print 'Connecting to rsync on "%s"' % dns_server
      rsync_string = 'rsync %s %s:%s -r' % (rsync_dir, rsync_url_string,
                                            options.destination_directory)
      handle = os.popen(rsync_string)
      rsync_text = handle.read()
      handle.close()

      if( rsync_text != ''):
        print rsync_text

      print 'Connecting to ssh on "%s"' % dns_server
      ssh_string = 'ssh %s \'/usr/sbin/rndc reload\'' % rsync_url_string

      handle = os.popen(ssh_string)
      ssh_text = handle.read()
      handle.close()

      if( ssh_text != ''):
        print ssh_text

if __name__ == "__main__":
    main(sys.argv[1:])
